Facebook Inc. rose as much as 4.1% following an announcement that it will join the benchmark Standard & Poor’s 500 Index next week, cementing the social-networking company’s recovery from the turbulence that surrounded its initial public offering last year.

Bitcoin, the digital money created as an alternative to currencies controlled by nations and banks, is finding that its wider adoption depends on both as governments in China and the U.S. demand enthusiasts play by existing rules.

Apple Inc. and Facebook Inc. will report quarterly earnings this week that underscore the technology industry’s division into two camps: providers that are adapting to shifting mobile and Web tastes, and those that have lagged behind.

Facebook Inc. Chief Executive Officer Mark Zuckerberg’s decision last year to bet big on mobile software is paying off, with sales of ads on wireless devices now on track to surpass revenue from desktop computers.

Facebook Inc., the world’s largest social-networking company, could be exposed to legal challenges surrounding its initial public offering similar to those faced by Morgan Stanley, according to legal experts.